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  <front>
    <journal-meta>
      <journal-id journal-id-type="nlm-ta">AI Agent</journal-id>
      <journal-id journal-id-type="publisher-id">aiagent</journal-id>
      <journal-title-group>
        <journal-title>AI Agent</journal-title>
      </journal-title-group>
      <issn pub-type="epub">3070-3719</issn>
      <publisher>
        <publisher-name>OAE Publishing Inc.</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="doi">10.20517/aiagent.2026.27</article-id>
      <article-id pub-id-type="publisher-id">AIAgent-2026-27</article-id>
      <article-categories>
        <subj-group>
          <subject>Research Highlight</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Robin as a lab-in-the-loop multi-agent system for scientific discovery</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-9502-8910</contrib-id>
          <name>
            <surname>Xing</surname>
            <given-names>Xiujing</given-names>
          </name>
          <xref ref-type="aff" rid="I1">
            <sup>1</sup>
          </xref>
          <xref ref-type="aff" rid="I1035">
            <sup>#</sup>
          </xref>
          <xref ref-type="corresp" rid="cor1">*</xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Zhang</surname>
            <given-names>Julie Ying</given-names>
          </name>
          <xref ref-type="aff" rid="I2">
            <sup>2</sup>
          </xref>
          <xref ref-type="aff" rid="I1035">
            <sup>#</sup>
          </xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Wang</surname>
            <given-names>Jiaao</given-names>
          </name>
          <xref ref-type="aff" rid="I3">
            <sup>3</sup>
          </xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Celaje</surname>
            <given-names>Jeff</given-names>
          </name>
          <xref ref-type="aff" rid="I4">
            <sup>4</sup>
          </xref>
        </contrib>
      </contrib-group>
      <aff id="I1"><sup>1</sup>Department of Chemistry, University of California, Davis, Davis, CA 95616, USA.</aff>
      <aff id="I2"><sup>2</sup>College of Health and Human Sciences, San Jose State University, San Jose, CA 95192, USA.</aff>
      <aff id="I3"><sup>3</sup>Department of Chemistry, The University of Texas, Austin, Austin, TX 78712, USA.</aff>
      <aff id="I4"><sup>4</sup>Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA.</aff>
      <aff id="I1035"><sup>#</sup>These authors contributed equally to this work.</aff>
      <author-notes>
        <corresp id="cor1">Correspondence to: Dr. Xiujing Xing, Department of Chemistry, University of California, Davis, Davis, CA 95616, USA. E-mail: <email>xiuxing@ucdavis.edu</email></corresp>
        <fn fn-type="other">
          <p><bold>Received:</bold> 17 Jun 2026 | <bold>First Decision:</bold> 24 Aug 2026 | <bold>Revised:</bold> 1 Sep 2026 | <bold>Accepted:</bold> 17 Sep 2026 | <bold>Published:</bold> 6 Nov 2026</p>
        </fn>
        <fn fn-type="other">
          <p><bold>Academic Editor:</bold> Aloysius Soon | <bold>Copy Editor:</bold> Tong Wang | <bold>Production Editor:</bold> Tong Wang</p>
        </fn>
      </author-notes>
      <pub-date pub-type="ppub">
        <year>2026</year>
      </pub-date>
      <pub-date pub-type="epub">
        <day>6</day>
        <month>11</month>
        <year>2026</year>
      </pub-date>
      <volume>2</volume>
	  <issue>4</issue>
      <elocation-id>33</elocation-id>
      <permissions>
        <copyright-statement>© The Author(s) 2026.</copyright-statement>
        <license xlink:href="https://creativecommons.org/licenses/by/4.0/">
          <license-p>© The Author(s) 2026.<bold>Open Access</bold>This article is licensed under a Creative Commons Attribution 4.0 International License (<uri xlink:href="https://creativecommons.org/licenses/by/4.0/">https://creativecommons.org/licenses/by/4.0/</uri>), which permits unrestricted use, sharing, adaptation, distribution and reproduction in any medium or format, for any purpose, even commercially, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.</license-p>
        </license>
      </permissions>
    </article-meta>
  </front>
  <body>
    <sec id="sec1">
      <title>MAIN TEXT</title>
      <p>Robin is best read as a careful lab-in-the-loop demonstration rather than as proof of fully autonomous biology. In the <italic>Nature</italic> study, Ghareeb <italic>et al.</italic> linked literature search, evidence synthesis, hypothesis ranking, experimental planning, computational analysis and hypothesis revision around one disease case: dry age-related macular degeneration (dAMD)<sup>[<xref ref-type="bibr" rid="B1">1</xref>]</sup>. Human scientists still chose the problem frame, performed the wet-lab work and retained responsibility for interpretation. The central message of the Highlight is therefore architectural: Robin makes the intellectual loop of discovery more explicit and auditable, but it does not remove the need for experimental validation.</p>
      <p>This contribution should be placed in a broader landscape of agentic science. Earlier work had already explored retrieval-augmented ontological graphs and multi-agent materials-design workflows<sup>[<xref ref-type="bibr" rid="B2">2</xref>]</sup>, autonomous chemical research agents that plan and execute laboratory tasks<sup>[<xref ref-type="bibr" rid="B3">3</xref>]</sup>, end-to-end artificial intelligence (AI)-research systems that generate ideas, run computational experiments and write papers<sup>[<xref ref-type="bibr" rid="B4">4</xref>]</sup>, and decentralized scientific-agent swarms such as ScienceClaw plus Infinite<sup>[<xref ref-type="bibr" rid="B5">5</xref>]</sup>. Robin differs from these examples less by being the first multi-agent scientific system and more by joining source-grounded biomedical hypothesis generation with follow-up analysis of newly produced experimental data in a single therapeutics workflow. <xref ref-type="table" rid="t1">Table 1</xref> summarizes these distinctions.</p>
      <table-wrap id="t1">
        <label>Table 1</label>
        <caption>
          <p>Robin in relation to prior agentic-science systems</p>
        </caption>
        <table frame="hsides" rules="groups">
  <thead>
    <tr>
      <td>
        <bold>System or direction</bold>
      </td>
      <td>
        <bold>What it demonstrates</bold>
      </td>
      <td>
        <bold>How Robin is positioned</bold>
      </td>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>RAG and multi-agent materials design<sup>[<xref ref-type="bibr" rid="B2">2</xref>]</sup></td>
      <td>Graph-based retrieval, multi-agent reasoning and executable simulations</td>
      <td>Shares the multi-agent/tool idea, but applies it to biomedical repurposing with wet-lab feedback</td>
    </tr>
    <tr>
      <td>Coscientist/Autonomous chemistry<sup>[<xref ref-type="bibr" rid="B3">3</xref>]</sup></td>
      <td>LLM planning and orchestration for chemistry workflows</td>
      <td>Robin emphasizes literature-grounded therapeutic hypotheses and post-experiment biological data analysis</td>
    </tr>
    <tr>
      <td>AI Scientist and related AI-research agents<sup>[<xref ref-type="bibr" rid="B4">4</xref>]</sup></td>
      <td>End-to-end computational research loops, manuscript generation and automated review</td>
      <td>Robin’s experiments are biological and lab-in-the-loop, so physical validation remains human executed</td>
    </tr>
    <tr>
      <td>ScienceClaw plus Infinite swarms<sup>[<xref ref-type="bibr" rid="B5">5</xref>]</sup></td>
      <td>Distributed agents coordinate through artifacts, provenance and shared scientific discourse</td>
      <td>Robin is more centrally scaffolded around one disease workflow rather than open-ended swarm discovery</td>
    </tr>
  </tbody>
</table>
        <table-wrap-foot>
          <fn id="t1FN1">
            <p>AI: Artificial intelligence; RAG: retrieval-augmented generation; LLM: large language model.</p>
          </fn>
        </table-wrap-foot>
      </table-wrap>
      <p>The system itself is deliberately modular [<xref ref-type="fig" rid="fig1">Figure 1</xref>]. Crow and Falcon are literature agents built on the PaperQA2 line of retrieval and evidence-synthesis work<sup>[<xref ref-type="bibr" rid="B6">6</xref>]</sup>: Crow provides fast orientation, whereas Falcon prepares deeper candidate reports. Finch writes and executes analysis code for data modalities such as flow cytometry and RNA sequencing. The division of labor is useful, but the ablation results should be interpreted with caution: better performance may arise from retrieval discipline, citation checking, tool access and workflow scaffolding, not from agent specialization alone.</p>
      <fig id="fig1" position="float">
        <label>Figure 1</label>
        <caption>
          <p>Robin’s lab-in-the-loop architecture.</p>
        </caption>
        <graphic xlink:href="aiagent2027.fig.1.jpg"/>
      </fig>
      <p>The dAMD case is compelling because Robin moved from a disease label to an experimentally testable phenotype. It reviewed 151 papers to nominate ten disease mechanisms, prioritized enhancement of retinal pigment epithelium (RPE) phagocytosis, and then reviewed about 400 additional papers to propose candidate compounds<sup>[<xref ref-type="bibr" rid="B1">1</xref>]</sup>. The initial positive result for Y-27632 supported the literature-derived reasoning but did not by itself constitute a therapeutic discovery; prior preclinical work had already shown that a clinically used rho kinase, Ripasudil (ROCK) inhibition can restore RPE phagocytic capacity in relevant contexts<sup>[<xref ref-type="bibr" rid="B7">7</xref>]</sup>.</p>
      <p>The stronger translational signal came in the second iteration. Robin nominated ten additional compounds, and Finch’s analysis reported that ripasudil, a glaucoma-approved ROCK inhibitor, increased ARPE-19 phagocytosis 1.89-fold relative to dimethyl sulfoxide controls; human analysis showed a 1.75-fold increase, and dose-response work plus primary human RPE stem-cell-derived assays supported greater potency than Y-27632 (Drug developed by Cayman Chemical Company; Cat. No. 10005583)<sup>[<xref ref-type="bibr" rid="B1">1</xref>]</sup>. KL001, a circadian-clock modulator, also emerged as an unexpected RPE-steam cell (SC) hit<sup>[<xref ref-type="bibr" rid="B1">1</xref>]</sup>. These findings are intriguing but remain preclinical and <italic>in vitro</italic>, with false-positive risk, assay dependence and replication requirements still unresolved. <xref ref-type="table" rid="t2">Table 2</xref> summarizes the evidence claims and interpretive cautions.</p>
      <table-wrap id="t2">
        <label>Table 2</label>
        <caption>
          <p>Evidence claims and interpretive cautions</p>
        </caption>
        <table frame="hsides" rules="groups">
  <thead>
    <tr>
      <td>
        <bold>Claim</bold>
      </td>
      <td>
        <bold>Supported by</bold>
      </td>
      <td>
        <bold>Important caution</bold>
      </td>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>RPE phagocytosis is a plausible dAMD intervention axis</td>
      <td>Literature review, mechanism ranking and the selected phagocytosis assay<sup>[<xref ref-type="bibr" rid="B1">1</xref>]</sup></td>
      <td>One disease use case cannot prove general discovery performance</td>
    </tr>
    <tr>
      <td>Ripasudil is a promising repurposing candidate</td>
      <td>ARPE-19 and RPE-SC assays, dose-response trends and known ocular use<sup>[<xref ref-type="bibr" rid="B1">1</xref>]</sup></td>
      <td><italic>In vivo</italic> models, dosing, durability and clinical endpoints remain untested</td>
    </tr>
    <tr>
      <td>KL001 broadens the search space</td>
      <td>Unexpected positive signal in RPE-SC screening<sup>[<xref ref-type="bibr" rid="B1">1</xref>]</sup></td>
      <td>Mechanism and reproducibility require follow-up work</td>
    </tr>
    <tr>
      <td>Agent scaffolding improves reliability</td>
      <td>Crow/Falcon ablations and Finch task evaluations<sup>[<xref ref-type="bibr" rid="B1">1</xref>]</sup></td>
      <td>The causal contribution of multi-agent decomposition is intertwined with retrieval, verification and tool use</td>
    </tr>
  </tbody>
</table>
        <table-wrap-foot>
          <fn id="t2FN1">
            <p>RPE: Retinal pigment epithelium; SC: steam cell; dAMD: dry age-related macular degeneration; KL001: drug developed by Cayman Chemical Company; Cat No. 13878; ARPE-19 cells: ATCC; Cat. No. CRL-2302.</p>
          </fn>
        </table-wrap-foot>
      </table-wrap>
      <p>Robin’s RNA-seq loop further shows how an agent can generate mechanistic follow-up rather than stop at a screening hit. After Y-27632 treatment, Finch identified a threefold critical lipid efflux pump (ABCA1) upregulation with a very small adjusted <italic>P</italic>-value<sup>[<xref ref-type="bibr" rid="B1">1</xref>]</sup>. ABCA1 is biologically plausible because lipid efflux in RPE is linked to retinal homeostasis and AMD-related degeneration<sup>[<xref ref-type="bibr" rid="B8">8</xref>]</sup>. Still, transcriptional association is not a mechanism: additional perturbation studies would be needed to prove that ABCA1 mediates the phagocytosis phenotype. Please note that this Research Highlight does not add new experiments; it clarifies what the reported study does and does not establish.</p>
      <p>The comparison with OpenAI Deep Research is informative but not decisive. Deep Research generated 17 unique candidates that were screened in RPE-SCs and did not identify ROCK inhibition<sup>[<xref ref-type="bibr" rid="B1">1</xref>]</sup>. However, retrieval strategy, prompt framing, tool access, candidate-selection policy and experimental context may all have differed. The fairest conclusion is not that one product is categorically superior, but that domain-specific scaffolds can matter when the scientific objective is narrow, evidence-sensitive and experimentally constrained.</p>
      <p>Robin therefore marks a meaningful step toward AI-organized discovery, while also illustrating the new evaluation bottleneck. Future systems will need transparent provenance, calibrated novelty checks, negative-result handling, reproducible notebooks, expert review and safety governance before they can be trusted across diseases or disciplines. For now, Robin should be valued as a well-grounded demonstration of semi-autonomous hypothesis-to-analysis orchestration, not as a general proof that distributed agents can autonomously discover therapies.</p>
    </sec>
  </body>
  <back>
    <sec>
      <title>DECLARATIONS</title>
      <sec>
        <title>Authors’ contributions</title>
        <p>Conceptualization, writing and editing, literature analysis: Xing, X.; Zhang, JY.</p>
        <p>Writing, literature analysis: Wang, J.; Celaje, J.</p>
      </sec>
      <sec>
        <title>Availability of data and materials</title>
        <p>Not applicable.</p>
      </sec>
      <sec>
        <title>AI and AI-assisted tools statement</title>
        <p>During the preparation of this manuscript, the AI tool ChatGPT (version 5.5 Pro, released 2026-04-23) was used solely for language editing. The tool did not influence the study design, data collection, analysis, interpretation, or the scientific content of the work. All authors take full responsibility for the accuracy, integrity, and final content of the manuscript.</p>
      </sec>
      <sec>
        <title>Financial support and sponsorship</title>
        <p>None.</p>
      </sec>
      <sec>
        <title>Conflicts of interest</title>
        <p>All authors declared that there are no conflicts of interest.</p>
      </sec>
      <sec>
        <title>Ethical approval and consent to participate</title>
        <p>Not applicable.</p>
      </sec>
      <sec>
        <title>Consent for publication</title>
        <p>Not applicable.</p>
      </sec>
      <sec>
        <title>Copyright</title>
        <p>© The Author(s) 2026.</p>
      </sec>
    </sec>
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